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Finding the Fourth Proportional to 191.58, 264.02 and 172.72

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Solution

The fourth proportional to 191.58, 264.02 and 172.72 is: 238.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    191.58 : 264.02 = 172.72 : x
  2. Step 2: Convert to fraction form
    191.58/264.02 = 172.72/x
  3. Step 3: Cross multiply
    191.58x = 264.02 × 172.72
  4. Step 4: Simplify right side
    191.58x = 45,601.46
  5. Step 5: Solve for x
    x = 45,601.46/191.58
  6. Step 6: Final answer
    x = 238.02

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.